Viessmann Vitodens 200 Service Instructions Manual page 74
Type wb2a, 8.8 to 20.0 kw wall mounted gas fired condensing boiler natural gas and lpg version
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Also See for Vitodens 200:
- Technical manual (180 pages) ,
- Installation instructions manual (148 pages) ,
- Service manual (132 pages)
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Troubleshooting
Fault codes
(cont.)
Display
Const.
Weath.-
fault
comp.
code
db
X
dd
X
dE
X
E4
X
X
E5
X
X
E6
X
X
F0
X
X
74
System char-
Cause
acteristics
Control mode
Room tem-
without room
perature
influence
sensor, heat-
ing circuit
with mixer
M2 shorted
out
Control mode
Room tem-
without room
perature
influence
sensor, heat-
ing circuit A1
lead broken
Control mode
Room tem-
without room
perature
influence
sensor, heat-
ing circuit
with mixer
M2 lead bro-
ken
Burner
Supply vol-
blocked
tage fault
Burner
Fault - flame
blocked
amplifier
Burner in a
Balanced
fault state
flue system
blocked
Burner
Internal fault
blocked
Measures
Check the room
temperature sen-
sor, heating cir-
cuit with mixer
M2.
Check the room
temperature sen-
sor, heating cir-
cuit A1 and the
remote control
DIP switch set-
tings (see
page 99).
Check the room
temperature sen-
sor, heating cir-
cuit with mixer M2
and the remote
control DIP switch
settings (see
page 99).
Replace the con-
trol unit.
Replace the con-
trol unit.
Check the ba-
lanced flue sys-
tem. Check the air
pressure switch.
Press "E".
Replace the con-
trol unit.
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